IncrediMail is a free, fun, powerful and user-friendly e-mail program that lets you add 1000s of e-mail backgrounds, Emoticons, Ecards, Sounds, Animations, and 3D effects to your e-mails. You also get fun animated characters to notify you of incoming e-mail.

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client. Sylpheed provides intuitive user-interface. Sylpheed is also designed for keyboard-oriented operation, so Sylpheed can be widely used from beginners to power users.